INW - TempHion Instruction Manual
19
One-Point Calibration
— First Calibration Point —
• Prepare the buffer.
• Rinse
sensor
fi rst with distilled water and then with small amount of the buffer.
• Place sensor in buffer. (Buffer must be deep enough to cover the sensing bulb in
the cutout on the sensor.)
• Allow time for sensor to stabilize.
• In
the
Ref pH
box for the fi rst point, enter the temperature adjusted reference pH
as noted in the preparation section above.
• Click
fi rst
Measure
button.
• When readings have stabilized to your satisfaction, click the
OK
button in the
pop-up box.
— Applying Calibration Values —
• Observe
the
I
value in the right hand section of the calculator. This should be
between the
I
values shown in the chart in Appendix B2.
• Click
the
Apply
button to apply calibration values.
• The reference value, the computed I, and the sample temperature will be
transferred to the calibration fi elds.
• Click
OK
to save the values to the sensor.
— Verifying Calibration Values —
• Using the Real Time Monitor, take a few readings while the sensor is still in
the buffer. Be sure units are set to pH. Readings should be very close to your
selected buffer.
Two-Point Calibration
— First Calibration Point —
• Prepare
fi rst buffer.
• Rinse
sensor
fi rst with distilled water and then with small amount of fi rst buffer.
• Place sensor in buffer. (Buffer must be deep enough to cover the sensing bulb in
the cutout on the sensor.)
• Allow time for sensor to stabilize.
• In
the
Ref pH
box for the fi rst point, enter the temperature adjusted reference pH
as noted in the preparation section above.
• Click
fi rst
Measure
button.
• When readings have stabilized to your satisfaction, click the
OK
button in the
pop-up box.
— Second Calibration Point —
• Prepare the second buffer.
• Rinse
sensor
fi rst with distilled water and then with small amount of second
buffer.
• Place sensor in second buffer. (Buffer must be deep enough to cover the sensing
bulb in the cutout on the sensor.)
